Auxiliary Information on results for the paper "H.E.S.S. follow-up observations of GRB 221009A”
(H.E.S.S. Collaboration, APJL 2023)

Link to the paper: https://iopscience.iop.org/article/10.3847/2041-8213/acc405



Main paper

Figure 1: Left: Excess count map, Middle: Significance map, Right: Significance distribution of the H.E.S.S. significance map of GRB 221009A for all nights.

All maps (including excess and significance maps in Fig. 1) from combinned datasets are listed within a single file and can be read by astropy/gammapy etc... : [FITS ]

Figure 2: 95% C.L. differential flux upper limits on an intrinsic GRB spectrum of the H.E.S.S. observational data taken on GRB 221009A

Left plot, i.e. all nights of H.E.S.S. observations
Data points: ECSV format (incl. additional information; can be used as input for astropy/gammapy/etc.)

   
E_ref [TeV]     E_min [ TeV]     E_max [TeV]     dNdE_UL [1/(cm^2 s TeV)]     N_ON     N_OFF     Alpha     is_ul
0.794 0.631 1.0 7.420e-12 9 100 0.0714 True
1.259 1.0 1.585 2.273e-12 10 170 0.0741 True
1.995 1.585 2.512 1.531e-12 7 123 0.0741 True
3.1623 2.512 3.981 1.559e-12 6 71 0.0769 True
5.012 3.981 6.309 1.721e-12 5 51 0.0769 True
7.943 6.309 9.999 5.114e-13 0 13 0.0741 True

Right plot, i.e. third night of H.E.S.S. observations
Data points: ECSV format (incl. additional information; can be used as input for astropy/gammapy/etc.)

   
E_ref [TeV]     E_min [ TeV]     E_max [TeV]     dNdE_UL [1/(cm^2 s TeV)]     N_ON     N_OFF     Alpha     is_ul
0.794 0.631 1.0 1.352e-11 4 47 0.0667 True
1.259 1 1.584 4.246e-12 1 35 0.0689 True
1.995 1.585 2.512 5.749e-12 2 27 0.0714 True
3.162 2.512 3.981 3.508e-12 1 10 0.0741 True
5.012 3.981 6.309 4.486e-12 1 9 0.0769 True
7.943 6.309 9.999 4.751e-12 0 1 0.0769 True



Figure 3: Logarithmic X-ray and gamma-ray Multi-wavelength energy flux light-curves of the GRB 221009A afterglow.

The details of the H.E.S.S. light-curve are given in the paper in Table 2,
The following package contains the data files and a jupyter notebook to reproduce the figure: Fig3_lightcurves.zip



Figure 4: Multi-wavelength SEDs of the GRB 221009A afterglow.

The following package contains the data files and a jupyter notebook to reproduce the figure: Fig4_MWL_sed.zip



Swift-XRT results

This archive, XRT_data_files.tar.gz, contains the files to recreate the time-sliced XRT analyses in this paper. The results are provided in Table 2 and plotted in Figures 3 and 4. The file ’timeslices_HESSnights.txt’ correspond to the time intervals described in Table 2, and were uploaded to https://www.swift.ac.uk/xrt_spectra/addspec.php?targ=01126853 to build the time-sliced spectra. The file 'xrt_auto_results.pdf' shows the results of the automated analyses for these time slices. Note that the model files contained in this archive are the ones produced automatically by the tool and do not represent the steps taken for the XRT analyses in the paper.



Additional information:

Theta-sqr distribution for all nights combined


Differential ULs for night 4 and night 9

95% C.L. differential flux upper limits on an intrinsic GRB spectrum of the H.E.S.S. observational data taken on GRB 221009A for night 4 and night 9. Due to very bad weather on night 5, the data are not used.

Left plot, i.e. night 4 of H.E.S.S. observations
Data points: ECSV format (incl. additional information; can be used as input for astropy/gammapy/etc.)

   
E_ref [TeV]     E_min [ TeV]     E_max [TeV]     dNdE_UL [1/(cm^2 s TeV)]     N_ON     N_OFF     Alpha     is_ul
1.241 1.0 1.540 6.081e-12 6 98 0.0625 True
1.911 1.540 2.371 3.180e-12 4 82 0.0625 True
2.943 2.371 3.652 4.030e-12 5 59 0.0625 True
4.870 3.652 6.494 2.058e-12 3 55 0.0634 True
8.058 6.494 9.999 1.792e-12 0 12 0.0612 True

Right plot, i.e. night 9 of H.E.S.S. observations
Data points: ECSV format (incl. additional information; can be used as input for astropy/gammapy/etc.)

   
E_ref [TeV]     E_min [ TeV]     E_max [TeV]     dNdE_UL [1/(cm^2 s TeV)]     N_ON     N_OFF     Alpha     is_ul
0.749 0.562 1.0 1.298e-12 2 29 0.0667 True
1.241 1.0 1.540 4.275e-12 2 62 0.0667 True
1.911 1.540 2.371 2.857e-12 1 30 0.0667 True
2.943 2.371 3.652 2.826e-12 1 12 0.0667 True
4.870 3.652 6.494 2.616e-12 1 11 0.0667 True
8.058 6.494 9.999 3.515e-12 0 5 0.0667 True




Collaboration Acknowledgement

The support of the Namibian authorities and of the University of Namibia in facilitating the construction and operation of H.E.S.S. is gratefully acknowledged, as is the support by the German Ministry for Education and Research (BMBF), the Max Planck Society, the German Research Foundation (DFG), the Helmholtz Association, the Alexander von Humboldt Foundation, the French Ministry of Higher Education, Research and Innovation, the Centre National de la Recherche Scientifique (CNRS/IN2P3 and CNRS/INSU), the Commissariat à l'énergie atomique et aux énergies alternatives (CEA), the U.K. Science and Technology Facilities Council (STFC), the Knut and Alice Wallenberg Foundation, the National Science Centre, Poland grant no. 2016/22/M/ST9/00382, the South African Department of Science and Technology and National Research Foundation, the University of Namibia, the National Commission on Research, Science & Technology of Namibia (NCRST), the Austrian Federal Ministry of Education, Science and Research and the Austrian Science Fund (FWF), the Australian Research Council (ARC), the Japan Society for the Promotion of Science and by the University of Amsterdam. We appreciate the excellent work of the technical support staff in Berlin, Zeuthen, Heidelberg, Palaiseau, Paris, Saclay, Tübingen and in Namibia in the construction and operation of the equipment. This work benefited from services provided by the H.E.S.S. Virtual Organisation, supported by the national resource providers of the EGI Federation.